For component value

Question

Hi:
What is the difference between the bound component.setValue() and component.getValueBinding("value").setValue(facesContext, obj)?
I have a jsf tag as:
                      <h:outputText id="packageCost_outputText"
                           binding="#{customerReg.uiOuptuPackageCost}"
                                value="#{customerReg.packageCost}" />The code piece in back bean as:
                    packageCost = packageInfoValue.getCost();
System.out.println("=0== packageCost="+packageCost);
                    FacesContext facesContext = FacesContext.getCurrentInstance();
                    ValueBinding vb = uiOuptuPackageCost.getValueBinding("value");
                    // vb.setValue(facesContext, new Double(packageCost));
System.out.println("=1== packageCost="+vb.getValue(facesContext));
                   uiOuptuPackageCost.setValue(new Double(33.3));
System.out.println("=2== packageCost="+vb.getValue(facesContext));
System.out.println("=3== packageCost="+(Double)uiOuptuPackageCost.getValue());The output for this code piece as:
17:48:30,472 INFO  [STDOUT] =0== packageCost=12.99
17:48:30,472 INFO  [STDOUT] =1== packageCost=12.99
17:48:30,482 INFO  [STDOUT] =2== packageCost=12.99
17:48:30,482 INFO  [STDOUT] =3== packageCost=33.3What is changed for using component.getValueBinding("value").setValue(facesContext, obj)? Doesn't it change the component value, or what value is returned from component.getValue() ?
Thanks for your time.
Paul

Answer 1

sorry I forgot to include the calcualtor frame class
//calculator frame extends JFrame
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class CalculatorFrame extends JFrame {
     public CalculatorFrame() {
          setSize(200,320);
          setTitle("Hermon Calculator");
          setVisible(true);
          CalculatorPanel FramePanel= new CalculatorPanel();
          Container FrameContainer= getContentPane();
          FrameContainer.add(FramePanel);
}